Buggy code:
public class ActivitiesPreferencePage3 extends PreferencePage implements IExecutableExtension , IWorkbenchPreferencePage { private class CategoryLabelProvider extends LabelProvider implements ITableLabelProvider , IActivityManagerListener { private LocalResourceManager manager = new LocalResourceManager ( JFaceResources . getResources ( ) ) ; private ImageDescriptor lockDescriptor ; private boolean decorate ; public CategoryLabelProvider ( boolean decorate ) { } public Image getColumnImage ( Object element , int columnIndex ) { } public String getColumnText ( Object element , int columnIndex ) { } public void dispose ( ) { } public void activityManagerChanged ( ActivityManagerEvent activityManagerEvent ) { } } private class CategoryContentProvider implements IStructuredContentProvider { public Object [ ] getElements ( Object inputElement ) { } public void dispose ( ) { } public void inputChanged ( Viewer viewer , Object oldInput , Object newInput ) { } } private class EmptyCategoryFilter extends ViewerFilter { public boolean select ( Viewer viewer , Object parentElement , Object element ) { } } protected IWorkbench workbench ; private CheckboxTableViewer categoryViewer ; private TableViewer dependantViewer ; private Text descriptionText ; private IMutableActivityManager workingCopy ; private Button activityPromptButton ; protected Control createContents ( Composite parent ) { } private void createPromptButton ( Composite composite ) { } private void createButtons ( Composite parent ) { } private void createDetailsArea ( Composite parent ) { Composite composite = new Composite ( parent , SWT . NONE ) ; GridLayout layout = new GridLayout ( ) ; layout . marginHeight = layout . marginWidth = 0 ; composite . setLayout ( layout ) ; composite . setLayoutData ( new GridData ( GridData . FILL_BOTH ) ) ; { Label label = new Label ( composite , SWT . NONE ) ; <START_BUG> label . setText ( "D&escription:" ) ; <END_BUG> descriptionText = new Text ( composite , ( ( SWT . READ_ONLY ) | ( SWT . BORDER ) ) ) ; GridData data = new GridData ( GridData . FILL_BOTH ) ; data . heightHint = 100 ; descriptionText . setLayoutData ( data ) ; } { Label label = new Label ( composite , SWT . NONE ) ; label . setText ( "Category<seq2seq4repair_space>&Requirements:" ) ; dependantViewer = new TableViewer ( composite , SWT . BORDER ) ; dependantViewer . getControl ( ) . setLayoutData ( new GridData ( GridData . FILL_BOTH ) ) ; dependantViewer . setContentProvider ( new ActivitiesPreferencePage3 . CategoryContentProvider ( ) ) ; dependantViewer . addFilter ( new ActivitiesPreferencePage3 . EmptyCategoryFilter ( ) ) ; dependantViewer . setLabelProvider ( new ActivitiesPreferencePage3 . CategoryLabelProvider ( false ) ) ; dependantViewer . setInput ( Collections . EMPTY_SET ) ; } } private void createCategoryArea ( Composite parent ) { } private ICategory [ ] getEnabledCategories ( ) { } protected void setDetails ( ICategory category ) { } protected void clearDetails ( ) { } public void init ( IWorkbench workbench ) { } protected boolean isLocked ( ICategory category ) { } public boolean performOk ( ) { } protected void performDefaults ( ) { } public void setInitializationData ( IConfigurationElement config , String propertyName , Object data ) { } }

Fix:
label . setText ( "Cat&egory<seq2seq4repair_space>Description:" ) ;